JP2569372B2 - Post-treatment agent for cysteamine hair treatment agent and hair treatment method - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a method of processing hair having a strong wave-forming power and a low generation of unpleasant odor, and more particularly to an unpleasant odor generated after hair treatment using a cysteamine hair treatment agent. Except for the method.

[Conventional technology]

Conventionally, various hair treatment agents have been used in performing hair treatment such as permanent wave.
Among them, cysteamine hair treatment agents are thioglycolic acid,
Compared to a hair treatment agent containing a reducing agent such as cysteine as a main agent, there is an advantage that the wave forming power and the hair straightening power are strong and the odor during treatment is small. However, this excellent hair treatment agent has a drawback that unpleasant odor is generated during hair washing and bathing for several weeks to several months after the treatment.

Thus, the present inventors investigated the cause of such an unpleasant odor, and found that cysteamine was oxidized to generate cystamine and mercaptan during the hair treatment treatment, and these products adsorbed and remained in the hair were used for hair washing and the like. It was found that this was due to desorption and evaporation during bathing. The product adsorbed on the hair as described above cannot be easily removed even by washing with a shampoo or a rinsing agent containing various surfactants such as anions, amphoteric, cationic and nonionic.

Further, an attempt was made to add a hydrolyzate of keratin or a derivative thereof to the cysteamine hair treatment agent, but the unpleasant odor was reduced but could not be completely removed.

[Problems to be solved by the invention]

Under such circumstances, in performing a treatment using a cysteamine hair treatment agent having excellent hair processing performance, cysteamine hair that can effectively suppress the generation of unpleasant odor due to cystamine, mercaptan, or the like after the treatment. It is an object of the present invention to provide a post-treatment agent for a processing agent, and further to provide a hair processing method capable of sufficiently suppressing the generation of unpleasant odor after treatment using a cysteamine hair processing agent. Is also an object of the present invention.

[Means for solving the problem]

An object of the present invention as described above is to include one or more selected from acids and salts, having a pH of 2 to 2.7 and containing 0.1 to 0.5 milliequivalent acid per ml. A distinctive system is achieved by a post-treatment for amine hair treatments.

After further processing the hair using a cysteamine hair treatment agent containing 1 to 10% of keratin hydrolyzate and an oxidative fixative, the post-treatment agent described above, that is, one selected from acids and salts Or containing two or more, and having a pH of 2 to 2.
The hair processing method of post-treating the hair using a post-treatment agent containing 0.1 to 0.5 milliequivalents of acid per 1 ml can suppress the generation of unpleasant odor to a satisfactory degree. it can.

Examples of the acid used in the post-treatment agent for the cysteamine hair treatment agent of the present invention include, for example, citric acid, malic acid, lactic acid,
Phosphoric acid, hydrochloric acid and the like;
More than one species can be selected and used. Among these acids, citric acid and malic acid are particularly preferred from the viewpoints of hair damage, skin irritation, pollution problems, and the like.

Examples of the salt used include salts of the above-mentioned acids with bases such as sodium hydroxide, potassium hydroxide, and ammonia, and one or more of these can be selected and used. Such a salt may be an acidic salt obtained by partially neutralizing the above acid with the above base.

The post-treatment agent for the cysteamine hair treatment agent of the present invention has a pH of
Must be within the range of 2 to 2.7, and the content of the acid, that is, the component capable of binding to the base, must be 0.1 to 0.5 meq / ml. If the pH is less than 2, the hair is hardened, which is not preferable. On the other hand, if the pH exceeds 2.7, the removal of unpleasant odor becomes insufficient. If the acid content is less than 0.1 meq / ml, the treatment effect becomes uncertain, and if it is more than 0.5 meq, the hair is liable to be hardened and damaged.

In preparing such a post-treatment agent, a method of dissolving and blending the acid or the salt or the acid and the salt in an amount of water so as to meet the above requirements can be used. However, an aqueous solution containing the acid is prepared in advance, and if necessary, the base is added thereto to adjust the pH to 2 to 2.7 and the free acid content to be 0.1 to 0.5 per ml.
You may make it partially neutralize so that it may become a milliequivalent.

The post-treatment agent for the cysteamine hair treatment agent of the present invention includes:
Other compounding ingredients as needed in a range not hindering the effects of the present invention, for example, cationic, anionic, amphoteric, nonionic or other high-molecular or low-molecular surfactants, urea,
Hair growth agents such as higher alcohols, protein hydrolysates and amino acids, preservatives, coloring agents, fragrances and the like can be added and blended.

In order to carry out the treatment according to the hair processing method of the present invention, the hair is preferably swollen and softened using a cysteamine hair treatment agent containing 1 to 10% of a keratin hydrolyzate as a first agent, and further containing an oxidizing agent as a main component. After performing the hair processing for oxidative fixation with the second agent, the post-treatment agent of the present invention is preferably applied to the hair to remove the unpleasant odor. In performing such post-treatment, as in a normal hair processing treatment, a procedure of removing the lot, applying a weakly acidic rinsing agent and washing with water after the treatment with the second agent is completed from the viewpoint of workability. Not preferred. Therefore, it is preferable to apply a post-treatment agent without removing the lot after the completion of the treatment with the second agent, leave the lot for, for example, 3 minutes or more, and then remove the lot and wash it sufficiently with water.

(Operation)

In a hair processing method using a cysteamine hair processing agent, in particular, after the treatment with the second agent is completed according to the hair processing method of the present invention, post-treatment with the post-treatment agent of the present invention provides a system amine hair processing agent. It is possible to effectively suppress the generation of the residual odor and the subsequent unpleasant odor. However, even if the post-treatment agent of the present invention is used as an intermediate rinsing agent immediately before the treatment with the second agent, that is, immediately after the treatment with the first agent, there is not much effect on the removal of these odors.

Example 1 Hereinafter, the present invention will be described specifically with reference to Examples.
The invention is not limited in any way by these examples.

A cysteamine hair treatment agent such as the formulation in Table 1
And A _1, A _2, and the second agent B ₁ is an aqueous solution containing 6g per 100ml sodium bromate, citrate was prepared a post-treatment agent C ₁ of the present invention is an aqueous solution containing 1g per 100ml.

Post-treatment agent C ₁ such invention, pH is 2.3, the free acid were those contained 0.14 milliequivalents per 1 ml.

A hair processing test was performed using the first agent, the second agent, and the post-treatment agent as described below.

2g of hair washed with 1% aqueous solution of sodium lauryl sulfate
₂ ml of cysteamine hair treatment agent (first agent A ₁ or A ₂ ) is applied to the hair using a dropper, and the hair is sealed in a container, left in a 40 ° C. incubator for 15 minutes, and then dried with a towel. Except for this, ₁ ml of the second agent B1 was applied using a spoid and allowed to stand for 7 minutes, and then ₁ ml of the second agent B1 was applied again using a spoid and allowed to stand for another 8 minutes. Then a post-treatment agent C ₁ of the present invention to 2ml applied using a dropper, and washed with water slurry was allowed to stand for 3 minutes.

On the other hand, when the post-treatment agent was not used, it was washed with water immediately after the treatment with the second agent.

After the treated hair was dried naturally, it was immersed in 20% hydrochloric acid at room temperature for 24 hours to extract cystamine, and cystamine was quantified by high performance liquid chromatography.

The results of measuring the amount of cystamine remaining in the hair in this manner are shown in Table 2 in comparison with the case where the post-treatment agent of the present invention was not used.

Further, a sensory test was conducted on the residual odor, and the results are also shown in Table 2.

From these results, it can be seen that the post-treatment using the post-treatment agent of the present invention clearly reduces the amount of cystamine remaining in the hair, and accordingly, the unpleasant odor. It is also found that when the cysteamine hair treating agent contains a keratin hydrolyzate, the unpleasant odor is further reduced.

Furthermore, from the value of the remaining amount of cystamine, cystamine remaining in the deep part of the hair does not cause unpleasant odor, and its amount is about 0.2%
Degree.

[Example 2] Cysteamine hair treatment agent 1st agent as prescribed in Table 3
A ₃ and A ₄ , a second agent B ₂ as shown in Table ₄ and a post-treatment agent C ₂ as shown in Table 5 were prepared.

Test No.5 around a (invention example) Lot while applying such a first agent A ₃ 80 ml of the actual hair, the intermediate acid rinse solution after allowing to stand for about 15 minutes
60 ml was applied. Next, after applying 80 ml of the second agent B ₂ and leaving it to stand for 10 minutes, 60 ml of the post-treatment agent C ₂ was applied, and after a lapse of 3 minutes, the lot was removed and washed thoroughly with water.

The reaction odor during such perm treatment was very small, and there was almost no residual odor peculiar to cysteamine perm. A supple and elastic wave was obtained on the hair.

Test No.6 place, except for using no (comparison) post-treatment agent C ₂ was subjected to permanent treatment in the same manner as in Test No.5, the reaction odors in perm treatment is was very small, cysteamine permanent specific There was a residual odor. Then, over a period of one to two weeks after the treatment, a unique unpleasant odor was generated each time the hair was applied and the hair was adjusted.

Test No.7 (comparison), except that the keratin hydrolyzate was used first agent A ₄ which are not compounded in the same manner as in Test No.6 was performed perm treatment. The reaction smell during perm treatment was relatively small,
In addition to the strong odor of cysteamine perm remaining, a unique unpleasant odor was generated during bathing and washing the hair for several weeks after the treatment, and an unpleasant odor was also generated when the hair was sprayed and water was set.

〔The invention's effect〕

The post-treatment agent for a cysteamine hair treatment agent of the present invention is used when performing a hair treatment treatment with a hair treatment agent containing cysteamine and has a low residual odor, and generates an unpleasant odor peculiar to cysteamine perm after the treatment. It can be extremely small.

Furthermore, according to the hair treatment method of the present invention using the first agent containing keratin hydrolyzate as a cysteamine hair treatment agent, the residual odor after the treatment can be further reduced in combination with the effect of the above-mentioned post-treatment agent. .

Claims (2)

(57) [Claims] 1. A system amine containing one or more selected from acids and salts, having a pH of 2 to 2.7 and containing 0.1 to 0.5 milliequivalent of acid per ml. Post-treatment agent for hair processing agents. 2. A hair treatment treatment using a cysteamine hair treatment agent containing 1 to 10% of a keratin hydrolyzate and an oxidative fixative, and then one or two selected from acids and salts.
Containing more than one species, with a pH of 2-2.7 and 0.1-0.5 per ml
A hair processing method comprising performing post-treatment of hair using a post-treatment agent containing a milliequivalent acid.